Machamp is generally annoying. In this team, Smeargle should not be used as a suicide lead because it needs to get as many entry hazards as it can. So if a Machamp lead crops up (they're pretty rare), the user would be wise to switch in Salamence or perhaps Latias as soon as possible. Smeargle can come in and set up SR and Spikes later.
There is one huge threat to this team that you didn't even address in the threat list: SubPetaya Empoleon. With Surf and Ice beam, it can easily kill every single member of your team. It can set up on Scizor's Bullet Punch very easily, or perhaps even Latias if she has used a Draco Meteor on something else. Your only option is to revenge kill it with Rotom, assuming it's still alive.
There is one huge threat to this team that you didn't even address in the threat list: SubPetaya Empoleon. With Surf and Ice beam, it can easily kill every single member of your team. It can set up on Scizor's Bullet Punch very easily, or perhaps even Latias if she has used a Draco Meteor on something else. Your only option is to revenge kill it with Rotom, assuming it's still alive.